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Gas insulated lines (GIL)[email protected]

November 2013

Restricted © Siemens AG 2013 All rights reserved.

Content

2013-07 Stephan Poehler / E T TS 2 G&C

Challenges in Mega Cities

Data, Site Works & Laying Methods of GIL

Technical Advantages of GILEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location

References

Summary

Technical Advantages of GILCapacitive LoadEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location


Challenges: Transmission Grid in Densely Populated Areas …in 1970 with 110kV



…in 2000 with several 110kV lines



…in Future with 400(500)kV



Content





References

Summary


Restricted © Siemens AG 2013 All rights reserved.7

Construction of a Welded GIL„OHL Underground“

Connection of Al tubes and conductors by welding Supported by cast resin insulators Filled with gas mixtureProtected by particle traps

Connection of Al tubes and conductors by welding Supported by cast resin insulators Filled with gas mixtureProtected by particle traps


Technical Data


Designed and tested according to IEC 61640 „HV gas-insulated transmission lines for rated voltages of 72.5 kV and above”

Rated Voltage 245 kV… 550 kV

Impulse withstand voltage … 1675 kV

Rated current (typical) 2000 … 5000 A

Rated short time current 63 kA / 3s

Rated Transmission Load up to 4700 MVA

Capacitance 55 nF/km

Overload capability (typical) 100 %

Insulation gas mixture e.g. 80 % N2 & 20 % SF6


Installation Site



Fitting of GIL Conductor on Site



Automated Orbital Welding of GIL



Ultrasonic Testing of Site Welds



GIL above Ground



GIL Laid in Tunnels or Directly Buried


Small width of trenchMin. interference with environment during installation

Space saving conceptCost advantage


Content





References

Summary



Capacitive Load C‘ of Transmission Systems

55nF/km

OHL GIL

15nF/km

210nF/km

XLPE-Cable 2 XLPE-Cables in parallel

420nF/km

Power Transmission with GIL Dr. Stephan Poehler Copyright © Siemens AG 2013

Energy Sector17(800 MVA, 400 kV)

GIL are installed with enclosures short-circuited and solidly grounded at both ends sothat the return current over the enclosure is almost as high as the current of the conductor and therefore the resulting magnetic field outside of the GIL is very low.

GIL Comprise Low Electromagnetic Field:Calculated Enclosure Currents of GIL

Power Transmission with GIL Dr. Stephan Poehler Copyright © Siemens AG 2013

Energy Sector18

Environment Friendly Low Electromagnetic Fields


Comparison of Losses: OHL vs. Cables & GIL (1 system)


GIL 517/500-180/160

Overhead Line 4x560/50AlSt

XLPE Cable 2XKLDE2Y

1x2500mm²

Overhead Line 4x240/40AlStP [W/m]

0,00

50,00

100,00

150,00

200,00

250,00

350,00

200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 A 3000150 400 700 1000 1200 1500 1800 MVA 2100


Auto Reclosure on GIL


Scenario:fault detection by protection systemline drop-off and arc extinguishing

Auto Reclosure:gas insulation is self-recoveringsuccessful auto re-closure: by-products are collected in the particle trapunsuccessful auto re-closure: no impact or fire outside the GIL

View inside the GIL Test Conditions: 63 kA, 500ms

No external impact, no fire risk due to non inflammable materials


GIL Secondary EquipmentGPS based Arc Location System



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References

Summary



GIL Wehr, Germany(1975) Tube Length 4 kms


1 600 MVA Transformer Rated Voltage 420 kV2 Encapsulated Surge Arrestors Rated Impulse3 Transfer Switching units Withstand Voltage 1640 kV4 GIL Connection Rated Current 2000 A5 Open Air Surge Arrestor Rated Short-Time Current 53 kA6 Overheadline

54

3,5 m

2,8 m


Palexpo Fair Building Airport Geneva, Switzerland (2002)


Tower 175

PALEXPOHall 6

Tower 176Rated Voltage: 300 kV Rated Rated Current: 2000 A Short-Time Current: 50 kA, 1sRated Impulse Single Phase Withstand Voltage: 1050 kV Length app.: 2500 m


Xiluodu GIL, Sichuan, China (I)(2013)


Customer: China Three Gorges Corporation

Country: ChinaCommissioning: 2013

Underground power transmission on highest reliability level.

Customer benefit

Gas Insulated Transmission Line (GIL) for 500kV; seven systems with 7 x 4500 A rated current.

Products

Connection of a 500-kV-OHL to an underground GIS with through a 480m deep shaft (~2x240m). Very high safety requirements with regard to fire protection, as the tunnel is used also as ventilation shaft.Maximum reliability needed for the connection.

Requirements


Xiluodu GIL, Sichuan, China (II)


Rated Voltage 550 kV Rated Current 4500 ARated Impulse- Rated Short-Time-withstand Voltage 1675 kV withstand Current 63 kA, 3 s

Single phase length app. 12750 m 480m vertical shaft in each circuit


Kelsterbach Airport Frankfurt, Germany (I)(2011)


OHL gantry

400 kV GIS

Customer: Amprion

Location: Airport Frankfurt

Contract award: July 2008

Operation: April 2011

Insulation Gas: 80%N2, 20%SF6

Transmission Power: 2x1800MVA

Installation: 1st GIL Directly Buried


Kelsterbach (II)Site View before Refilling of the Trench



Neuwied, Munich, Germany (2014)

Customer: Stadtwerke MunichLocation: NeuwiedContract award: Feb. 2013Commercial Operation: Dec. 2013Insulation Gas: 80%N2, 20%SF6Transmission Power: 2x2000MVAInstallation: Tunnel


Selected References – Gas Insulated Transmission Lines, Status November 2013*


Schluchseewerk AGWehr, Germany4000 m / 1975

ERTAN Hydro PowerJinping I, China3300 m / 2012

Rheinisch WestfälischeElektrizitätswerkeKelsterbach, Germany5400 m / 2011

Badenwerk Rheinhafen, GermanySteampower station unit 7800 m / 1982

NeckarwerkeAltbach, Germany800 m / 1985

Statkraft (NVE)RoD, Norway110 m / 1981

Stadtwerke MünchenLangwied, Germany870 m / 2013

Austria Hydro PowerLimberg II, Austria465 m / 2010

National Grid TranscoElstree, Great Britain750 m / 2004

Energie Ouest SuissePALEXPO, Switzerland2560 m / 2001

China Three GorgesProject Corporation, Xiluodu, China12750 m / 2013

Public Utilities BoardSenoko, Singapore401 m / 1993

Perusahaan UmumListrik Negara PLNGresik Power Plant, Indonesia2300 m / 1992

Electricity GeneratingAuthority of ThailandSai Noi, Thailand3510 m / 2002

Tehri Hydro Develop-ment Corp., Tehri Hydro Project, India4550 m / 2006

Dubai Electricity andWater AuthorityWarsan, Dubai4050 m / 2007

Saudi ConsolidatedElectricity Company9023, Saudi Arabia21,000 m / 2010

Saudi ConsolidatedElectricity CompanyRabigh/Yanbu, Saudi Arabia1340 m / 1988

Swawek, WindhoekRuacana, Namibia800 m /1976

Atomic Energy Org.Nuclear power station Iran 1, Iran3700 m

Deutsche Babcock AG forMinistery of ElectricityHoms P.S., Libya800 m / 1980

SNEC Jeddah, Saudi Arabia300 m / 1981

Ontario HydroBowmanville, Canada1257 m / 1987

Egyptian Electricity AuthorityItay el Baroud, Egypt670 m / 1993

Cairo ElectricityPower Corp.Cairo, Egypt1850 m / 2004

*) overall tube length 92,959 m

National GridStella West, GB 1258 m / 2010

National GridPenwortham, GB770 m / 2011 ff

Dubai Electricity andWater AuthoritySeries Reactors, Dubai1100 m / 2011

NEEWS Northeast Utilities Service Co., USA1275 m / 2011

Dubai Electricity andWater AuthorityLM Station, Dubai1400 m / 2012

Tenaga Nasional Berhad, AIR TAWARMalaysia1560 m / 2013

SEC-COA420kV Shoaibah 3Saudi Arabia750 m / 2012

above ground installationtunnel installationdirectly buried installation


Content





References

Summary


Restricted © Siemens AG 2013 All rights reserved.2013-07 Stephan Poehler / E T TS 2 G&C

Sealed for lifetimeContinuously weldedHigh ampacityLow lossesLong lifetime through particle trapNo reactive compensation (<100km)No ageing of insulating gasAutomatic reclosure functionalityLow external electromagnetic fieldsHigh safety (no fire hazard)

Summary

november 2013 gas insulated lines (gil) - smartsb.ro · gas insulated lines (gil) ... gresik power...

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